Update to 0.94

Upstream changes:
0.94 - 2012-12-03, H.Merijn Brand
    * Guard against beta releases of Encode (Xavier Guimard - RT#81499)
    * Fix sv_cache init global-buffer-overflow (Reini Urban - RT#81469)
    * Tested with perl compiled with clag (also to verify RT#81469)
    * Fix memory leak reported in RT#81539 (Fix by Tony Cook)

0.93 - 2012-11-19, H.Merijn Brand
    * Skip Encode related tests on too old Encode
    * Force old(er) tar format (ustar) - assumes GNU tar on release box

0.92 - 2012-11-12, H.Merijn Brand
    * Allow bind_columns () for print ()
    * Increase buffer size for print to 64k
    * Fix RT#80680 - Buffer break halfway UTF8 + tests

(wen)